I think it's a done deal, but I'd like a second option. I replaced the upper and lower door switches as well as the middle secondary switch but the unit still doesn't cook when the door is closed (fan turns on but timer doesn't count down and it's not heating (or heating very weakly).

Is there anything else to try before buying a new $200 microwave?

For brands I am looking at:
Whirlpool 1.9cu ft Model: WMH32519CW
GE 1.7cu ft Model: JVM6175DKWW

These are both $200.

There is a Whirlpool 1.7cu ft Model: WMH31017AW for $150, but I'd give up steam cooking, sensor cooking, less of a vent fan and a few other features.

If I went up in budget what do I really gain? I'd like to stay with a white finish to match my other appliances.